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问题 选择题

为保证牛奶的品质, 并利于保存, 袋装牛奶在生产过程中常采用 (    )

A．高压冷冻

B．真空脱水

C．灭菌密封

D．真空密封

答案

答案：C

牛奶采用的是高温杀菌，然后进行密封，阻止细菌的进入。

改错题

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中

共有l0处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)戈lj掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词。

2．只允许修改l0处，多者(从第ll处起)不计分。

I’m writing to invite you to visit China and spending the Sumner vacation with me． I have made wonderful plan for it．First，we can go to Qingda0，there it is cool and mild， and have funs at the seaside．Then we were to participate in a Taiji camp in the Wudang Mountains． You  are curious about Chinese Kongfu，but I believe this is a good chance to learn it． Last of all，I have also been longed to take you to the countryside．We can stay there for a few days and vi sit to some relatives of me．I hope this plan suits you good and I am looking forward to

your coming．
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单项选择题

Magnetic resonance imaging (MRI)—a noninvasive diagnostic procedure—can be used to identify blockages in the coronary arteries. In contrast to angiograms—the invasive procedure customarily used—MRI’s pose no risk to patients. Thus, to guarantee patient safety in the attempt to diagnose arterial blockages, MRI’s should replace angiograms in all attempts at diagnosing coronary blockages.
Which of the following, if true, would most support the recommendation above

A．Angiograms can be used to diagnose conditions other than blockages in arteries.

B．MRI’s were designed primarily in order to diagnose blockages in the coronary arteries.

C．Angiograms reveal more information about the nature of a blockage than an MRI can.

D．An MRI is just as likely as an angiogram to identify an arterial blockage.

E．(E) Some patients for whom an angiogram presents no risk are unwilling to undergo an MRI.
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