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问题 单项选择题

必须用X线片检查诊断的疾病是

A．咬合面龋
B．急性牙髓炎
C．慢性牙髓炎
D．急性根尖周炎
E．慢性根尖周炎

答案

参考答案：E

解析： 慢性根尖周炎主要依靠X线检查的不同表现和参考临床症状。故答案为E。

单项选择题

测定饮用水的pH值用到的仪器是（）。

A.电导率仪

B.浊度计

C.酸度计

D.折光仪
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单项选择题

Did you ever have someone’s name on the tip of your tongue and yet you were unable to recall it (1) this happens again, do no (2) to recall it. Do something (3) for a couple of minutes, (4) the name may come into your head. The name is there since you have met (5) person and his name. It (6) has to be dug out. The initial effort to recall (7) the mind for operation, but it is the subconscious (8) that go to work to dig up a (9) memory. Forcing yourself to recall (10) never helps because it doesn’t (11) your memory；it only tightens it. Students find the preparatory method help (12) examinations. They read over the questions (13) trying to answer any of them. (14) they answer first the ones (15) which they are most confident. Meanwhile, deeper mental activities in the subconscious mind are taking (16) ; work is being done on the (17) difficult questions. By the time the easier questions are answered, answers (18) the more difficult ones will usually begin to (19) into consciousness. It is often (20) a question of waiting for recall to come to the memory.

15（）

A.of

B.with

C.for

D.in
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