0.1%的乳酸可作为注射剂的哪类附加剂（） A.缓冲剂 B.抑菌剂 C.局麻剂 D.

在pH=1的无色溶液中，下列离子能大量共存的是

A．NH₄⁺、Ba²⁺、NO₃^—、CO₃^2—

B．K⁺、Mg²⁺、NO₃^－、SO₄^2—

C．Fe²⁺、OH^—、SO₄^2—、MnO₄^—

D．Na⁺、Fe³⁺、Cl^—、AlO₂^—

Several recent studies have found that being randomly (随机地) assigned to a roommate of another race can lead to increased tolerance but also to a greater likelihood (可能性) of conflict.

Recent reports found that lodging with a student of a different race may decrease prejudice and force students to engage in more ethnically diverse friendships.

An Ohio State University study also found that black students living with a white roommate saw higher academic success throughout their college careers. Researchers believe this may be caused by social pressure.

In a New York Times article, Sam Boakye – the only black student on his freshman year floor -said that "if you're surrounded by whites, you have something to prove."

Researchers also observed problems resulting from pairing interracial students in residences.

According to two recent studies, randomly assigned roommates of different races are more likely to experience conflicts so strained that one roommate will move out.

An Indiana University study found that interracial roommates were three times as likely as two white roommates to no longer live together by the end of the semester.

Grace Kao, a professor at Penn said she was not surprised by the findings. "This may be the first time that some of these students have interacted, and lived, with someone of a different race," she said.

At Penn, students are not asked to indicate race when applying for housing.

"One of the great things about freshman housing is that, with some exceptions, the process throws you together randomly," said Undergraduate Assembly chairman Alec Webley. "This is the definition of integration."

"I've experienced roommate conflicts between interracial students that have both broken down stereotypes(模式化形象) and strengthened stereotypes," said one Penn resident advisor (RA). The RA of two years added that while some conflicts "provided more multicultural acceptance and melding (融合)," there were also "jarring cultural resistance."

The RA said that these conflicts have also occurred among roommates of the same race.

Kao said she cautions against forming any generalizations based on any one of the studies, noting that more background characteristics of the students need to be studied and explained.

小题1:What can we learn from some recent studies?

A．Conflicts between students of different races are unavoidable.

B．Interracial lodging may have diverse outcomes.

C．Students of different races are prejudiced against each other.

D．Interracial lodging does more harm than good.小题2:What does the Indiana University study show?

A．Few white students like sharing a room with a black peer.

B．Roommates of different races just don't get along.

C．Interracial roommates are more likely to fall out.

D．Assigning students' lodging randomly is not a good policy.小题3:What does Alec Webley consider to be the "definition of integration"?

A．The school randomly assigns roommates without regard to race.

B．Students of different races are required to share a room.

C．Interracial lodging is arranged by the school for freshmen.

D．Lodging is assigned to students of different races without exception.小题4:What can be inferred from Grace Kao’s saying about interracial lodging?

A．Schools should be cautious when making decisions about student lodging.

B．Students' racial background should be considered before lodging is assigned.

C．Experienced resident advisors should be assigned to handle the problems.

D．It is unscientific to make generalizations about it without further study.

下列选项不能反应重庆理工大学校徽寓意的是（）

A.整个图案由字母“CQUT”巧妙组成（见图示），代表重庆理工大学

B.图案似变形的跑道，三条跑道喻为学校人才培养、科学研究、社会服务三大职能，图案象征重庆理工大学及成千上万青年学子一往无前，奔向灿烂前程

C.校徽采用马门溪龙图案，其寓意是希望该校也像马门溪龙一样独具特色，冲出国门，走向世界，跨入中国西部乃至世界名校行列，并寓意重庆理工大学前程似锦、灿烂辉煌

下列各项资产中，无论是否存在减值迹象，至少应于每年年度终了对其进行减值测试的是（）。

A.商誉

B.使用寿命确定的无形资产

C.长期股权投资

D.投资性房地产

E.使用寿命不确定的无形资产

有关表面活性剂的正确表述是：

A．表面活性剂均有很大毒性

B．非离子表面活性剂的HLB值越小，亲水性越弱

C．表面活性剂的浓度要在临界胶团浓度以下，才有增溶作用

D．阴离子表面活性剂具有很强杀菌作用，故常用作杀菌和防腐剂

E．表面活性剂用作乳化剂时，其浓度必须达到临界胶团浓度