________ the alien was in the museum, I

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问题选择题

________ the alien was in the museum, I called the TV station.

A．Because

B．Then

C．As soon as

D．While

答案

答案：D

连词辨析。Because因为；Then然后； As soon as 一……就；While 当……时候。句意：当外星人在博物馆的时候，我打电话给了电视台。故选Ｄ。

此题考查while引导的时间状语从句表示当…的时候。

单项选择题

Young girls at high risk for depression appear to have a malfunctioning reward system in their brains, a new study suggests. The finding comes from research that (1) a high-risk group of 13 girls, aged 10 to 14, who were not depressed but had mothers who (2) recurrent depression and a low-risk group of 13 girls with no (3) or family history of depression. Both groups were given MRI brain (4) while completing a task that could (5) either reward or punishment.

(6) with girls in the low-risk group, those in the high-risk group had (7) neural responses during both anticipation and receipt of the reward. (8) , the high-risk girls showed no (9) in an area of the brain called the dorsal anterior cingulated cortex (背侧前扣带皮质), believed to play a role in (10) past experiences to assist learning.

The high-risk girls did have greater activation of this brain area (11) receiving punishment, compared with the other girls. The researchers said that this suggests that high-risk girls have easier time (12) information about loss and punishment than information about reward and pleasure.

"Considered together with reduced activation in the striatal (纹状体的) areas commonly observed (13) reward, it seems that the reward-processing system is critically (14) in daughters who are at elevated risk for depression, (15) they have not yet experienced a depressive (16) ," wrote Ian H. Gotlib, of Stanford University, and his colleagues. " (17) , longitudinal studies are needed to determine whether the anomalous activations (18) in this study during the processing of (19) and losses are associated with the (20) onset of depression," they concluded. The study was published in the April of the Archives of General Psychiatry.

14（）

A.repaired

B.impaired

C.healed

D.damaged

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不定项选择

选用PLC系统要考虑（）。

A、系统的规模和功能要求

B、I/O功能和驱动能力

C、编程方法及其它性能

D、其它安全性能

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