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问题 单项选择题

“学生必须先发表他的见解，才能看到别人的帖子”属于的讨论类型是（）。

A.每人发布一个话题

B.一般用途的标准讨论区

C.提问与回答讨论区

D.单个简单话题

答案

参考答案：A

选择题

对一定量的气体，下列说法正确的是：（  　）

A．气体分子的热运动越剧烈，气体的温度就越高

B．气体体积是指所有气体分子的体积之和

C．气体对器壁的压强是由大量气体分子对器壁频繁碰撞而产生的

D．当气体膨胀时，气体的分子势能减小，因而气体的内能一定减少
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单项选择题

Mr. Faugel was convinced that student nervousness had affected their scores; to reduce the anxiety of these students who had already been tested, he gave 22 of them a beta blocker before readministration of the test. Their scores improved significantly. The other 8 students (who did not receive the beta blockers) improved only slightly. Second-time test-takers nationwide had average improvements which were similar to those in Faugel’’s non-beta blocker group. Beta blockers are prescription drugs which have been around for 25 years. These medications, which interfere with the effects of adrenalin, have been used for heart conditions and for minor stress such as stage fright. Now they are used for test anxiety. These drugs seem to help test-takers who have low scores because of test fright, but not those who do not know the material. Since there can be side effects from these beta blockers, physicians are not ready to prescribe them routinely for all test-takers.

Beta blockers work on some physical and emotional symptoms because they________.

A．fool a person into a healthier stance

B．interfere with the effects of adrenalin

C．produce side effects worse than the symptoms

D．primarily change human thought processes
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