在Excel中，一个工作簿可以包含（）工作表。A、1个 B、2个 C、3个 D、多个

In North America, most students go to school by bus. The subway is also widely used in some cities. In small towns and cities, walking is still popular.

The yellow school bus is a familiar sight all over North America. It is a very convenient form of transportation because it takes students right to the entrance to the school. It also gives students opportunity to chat with their friends. However, the bus is slow and does not always pick up on time.

The subway is a means of getting around quickly in many cities. However, it is expensive and can be very crowded during rush hour. Another disadvantage of the subway is that the stops are not so close to the school, and students often have to walk considerable distance or take a bus from the subway stop to the scho

Walking has a number of advantages for those who live reasonable close to school. It's free and it provides a form of exercise. However, it's no fun if you have a large backpack full of books to carry. It's also unpleasant if the weather is either too hot or cold or wet.

小题1:In North America, most students usually go to school by_________.

A. school bus or subway B. car or bicycle C. taxi or car

小题2: For many students, the yellow school bus is convenient but it is_________.

A. too expensive B. slow and sometimes late      C. crowded and dirty

小题3:Subways are fast but the stops are often a little bit_________the school.

A. close to B. busy for C. far away from

小题4:Walking is a good way for the students that live reasonable close to school and it is_________.

A. not convenient B. bad for health C. good for health

小题5:This passage is about_________in North America.

A. transportation B. students C. schools

按生殖方式不同，植物可分为的类群是

①种子植物 ②孢子植物 ③被子植物 ④裸子植物[ ]

A．③④

B．①③

C．②③

D．①②

十万级洁净区的指标为

A．沉降菌/皿≤15

B．沉降菌/皿≤10

C．沉降菌/皿≤5

D．沉降菌/皿≤3

E．沉降菌/皿≤1

章女士，54岁，放置宫内节育器18年，现绝经1年，到门诊要求取出节育器。妇科检查：外阴发育正常，已婚已产型； * * 通畅，黏膜略平滑，分泌物无色、量少；宫颈光滑，大小正常；宫体前倾前屈位，正常大小，活动良好；双附件未触及异常。

向她提供的健康指导内容，正确的是（）

A.提醒病人手术前注意憋尿

B.手术前病人需要进行X线常规检查

C.手术后禁止性生活2周

D.取出节育器后卧床休息3天

E.手术后B超检查核实取器术的效果

某国有企业一部分产品因成本高、价格高而没有销路，造成产品积压;资金不能周转，无法清偿到期债务，企业濒临倒闭。债权人多次要求清偿债务，并声明再不清偿债务将向人民法院申请宣告读国有企业破产。该企业无奈，拟采取下列措施，请判断企业下列哪些行为不属于不正当竞争?()

A.将即将到期的产品，以低于成本价格出售

B.将其他大量积压产品以低于成本价格出售

C.将其他一部分积压的产品以低于成本价格出售，以用来和A、B两项的收入共同清偿到期债务

D.将另一部分不积压的产品也以低于成本价格出售，以加强企业产品竞争力，占领市场