氟利昂制冷剂具有（）优点。 A.沸点低 B.制冷能力强 C.不可燃 D.无腐蚀 E.

One day Mrs. Wilson went shopping with Tracy and Ben. They went to the supermarket in the new shopping center.” Why do you buy things here?” Tracy wanted to know. “Because they are cheaper here than at the corner store near our home,” Mrs. Wilson said.” Help me check the prices, please.” The Wilsons were not rich and Mrs. Wilson was always careful with her money. She looked carefully after the prices of things. She bought lots of things in the supermarket. When they got home, the children said,“ We don’t think you saved money by going to the supermarket.” “Of course I did,” Mrs. Wilson said. “ Everything was cheaper there.” “We know,” the children said,“ but we came home by taxi because we had too much to carry. The taxi fare was more than the money that you save! ” Mrs. Wilson added everything up. Her children were right.

小题1:The things at the corner store were ______than those in the supermarket.

A．cheaper

B．nicer

C．more expensive

D．saved a little money小题2:Mrs. Wilson ______ in the end.

A．spent more money

B．paid less money

C．lost some money

D．saved a little money小题3:From the passage we know the children were _________.

A．happy

B．clever

C．tired

D．lazy小题4:Mrs. Wilson will _____________.

A．never call a taxi

B．go on buying things in the supermarket

C．buy things near her home

D．not go shopping with her children小题5:The best title for the passage is ____________.

A．Cutting Price

B．Corner Store

C．Supermarket

D．Shopping

引起高钙血症常见的肿瘤是()

A．乳腺癌 

B．非小细胞肺癌 

C．多发性骨髓瘤 

D．肾上腺肿瘤 

E．头颈部鳞癌 

男性，52岁，发现右侧腹股沟区包块10年，站立时明显，平卧后消失，有时可降入阴囊，可还纳。查：右侧腹股沟区肿块，约8cm×6cm大小，可还纳，外环容3指，压迫内环后肿块不再出现。

如上述病人行Halsted修补术，精索的位置是（）

A.腹外斜肌腱膜下，腹内斜肌外侧

B.腹内斜肌下，腹横肌外

C.皮下，腹外斜肌腱膜外

D.腹内斜肌内侧，腹膜外

E.没有改变精索位置

变速器是传递发动机动力的机构，它可以适应轨道车行驶（）的变化，来改变轨道车行驶的牵引力和行驶速度。

A、阻力

B、速度

C、牵引

D、变速

狭义的遗传工程指的是（）。

A.基因工程

B.细胞工程

C.酶工程

D.染色体工程