下列食物蛋白质的消化率最高的是（）。 A.全鸡蛋蛋白质 B.全牛奶蛋白质 C.鱼蛋白

某兴趣小组为验证鱼骨的成分，把鱼骨放在酒精灯上充分煅烧，得到白色固体，冷却后研成粉末，再向白色粉末中加入足量稀盐酸，有能使澄清石灰水变浑浊的气体生成．请回答：

（1）鱼骨中被烧掉的物质是 _________ ．（填“有机物”或“无机物”）

（2）已知动物的骨骼中含有Ca²⁺，则鱼骨中至少含有的物质是 _________ ．（填化学式）

（3）下列说法中错误的一项是（ _________ ）

A．鱼骨放入稀盐酸中浸泡会变软，B．饮用牛奶可补充钙质

C．骨质疏松患者不宜补钙，D．胃酸能促进钙质的吸收

Nowadays, millions of lonely singles are now going online instead. The World Wide Web is quickly becoming the world’s most popular matchmaker（媒人）.

Singles are flocking（涌向）to the Internet mainly because their busy lifestyles leave them little time to look for a significant other. Using dating sites（约会网址）is quick and convenient. Many singles say the regular dating scene has just led them from one bad experience to another and are ready to try something else. Dating sites also make it easy to avoid someone you are not interested in. In the real world, however, ignoring someone you don’t like can be difficult.

Despite all the advantages, online dating also presents its own set of problems. People aren’t always those who they declare to be in their online description. Safety is another concern. You are just likely to find a criminal online as you are Mr. or Miss Right.

Online dating experts recommend following a few safety tips:

Guard your personal information. Never give out your personal information online. This includes your last name, phone number, home address and place of work.

Watch for red flags. Do any of the people you are chatting with make disrespectful comments? Do they try to control you? Do they give false information about themselves? If so, forget them!

Meet in a safe place. When meeting someone in person, choose a public location with other people around.

Following these tips and you might be able to find the person of your dreams.

小题1:According to the passage, many lonely singles don’t appreciate the regular dating scene because it is _____________.

A．unpopular

B．troublesome

C．convenient

D．forgettable小题2:The underlined words in the second paragraph “a significant other” means _______”.

A．a true friend

B．a matchmaker

C．a marriage partner

D．a happy family小题3:Which of the following is NOT a suitable place for meeting someone you get to know through the Internet for the first time?

A．At his / her house.

B．At the museum.

C．At McDonald’s.

D．At the bookstore.小题4:From this passage, we can infer that ____________.

A．there are mostly homely and unemployed people online

B．the police had better find criminals online

C．we can find love only through the dating sites

D．following safety tips ensures a safe online dating experience

以下不属于口腔颌面部肿瘤的影像学检查的是（）

A.CT

B.FNA

C.X-ray

D.MRI

E.UT

一足月顺产儿，25d。出生体重3．2kg，以母乳喂养。生后第3天出现黄疸，至今黄疸不退。小儿胃纳好，体温正常。体检：体重3．85kg，除皮肤黄染外，无其他异常。血常规及尿常规均正常，血清胆红素204μmol／L。如何处理（）

A.光照疗法

B.交换输血

C.口服泼尼松

D.服用苯巴比妥及尼可刹米

E.解释

某商品流通企业为扩大销售额制定了四个方案。四个方案所需的费用与可能得到的结果如下表所示：

方案	费用(万元)	销售额预计(万元)
甲	5	90
乙	8	180
丙	10	220
丁	13	260

请问该企业应选( )方案。

A．甲
B．乙
C．丙
D．丁