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【单选题】
弦脉的特征是A.
端直以长，如按琴弦
B.
脉来绷急，如转绳索
C.
脉形宽大，来
D.
脉来急速，一息五六至
E.
脉来急疾，一息七八至
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【单选题】硒（Se）是人体中的微量元素，有防癌抗癌作用．饮用含适量硒的矿泉水有益于人体健康．有一种硒的氧化物，化学式为SeO 3 ，其中Se的化合价为（ ）
A.
+3
B.
-3
C.
+6
D.
-6
【简答题】甘草中具有抗炎、镇咳、抗癌作用的成分是
【单选题】Which of the following modulations is for the VHF radio telephone?
A.
G3E
B.
F3E
C.
G2B
D.
F1B
【单选题】Which of the following facts from the selection best supports the statement that the radioactive waste is an unsolved problem?
A.
We have already generated over 10,000 tons of nuclear waste.
B.
Radioactivity could be released into the environmental from activities related to mining and processing nuclear fuel.
C.
Only a part of nuclear fuel is fissionable.
D.
A location for stainless steel tanks containing 'high-level liquid waste' mixed with molten glass has not been found.
【单选题】Once ARQ communication with the coast radio station has been establ/shed, which of the following exchanges will most likely take place?
A.
The vessel then requests the coast radio station's selcall so that communication can be set up on the appropriate working channel. ’
B.
Since communication has akeady shifted to the working channel, the vessel then transmits the subscriber number and text of the message to be sent for the coast radio station to store and forward.
C.
After exchanging answerbacks with the vessel, the coast radio station transmits.c GA+"．
D.
After exchanging answerbacks with the coast radio station, the vessel transmits“GA+”．
【简答题】简答中心性发绀和周围性发绀的鉴别要点
【单选题】Which of the following characteristics of radio galaxies is mentioned in the passage?
A.
They are a type of elliptical galaxy.
B.
They are usually too small to be seen with a telescope.
C.
They are closely related to irregular galaxies.
D.
They are not as bright as spiral galaxies.
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