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【单选题】
能够引起颈动脉体和主动脉体化学感受器兴奋的适宜刺激是()
A.
CO 2 分压下降
B.
O 2 分压升高
C.
H + 浓度下降
D.
O 2 分压下降和CO 2 分压升高
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参考答案:
举一反三
【单选题】实验室用高锰酸钾制纯净氧气时,下列做法错误的是
A.
在试管口放一团棉花,防止高锰酸钾粉末进入导管
B.
把试管口略向下倾斜固定在铁架台上
C.
导管口开始有气泡放出时就立即收集,防止生成的气体跑掉
D.
用高锰酸钾制取所需氧气停止加热时,先要把导管移出水面,然后再熄灭酒精灯
【单选题】I often go swimming with my father______Sunday.
A.
in
B.
on
C.
at
D.
of
【简答题】句型转换。 l. My father often watches TV in the evening.(改为否定句) My father _____ _____ often TV in the evening. 2. The girls are waiting for a famous actor.(改为一般疑问句) _____ the girls waiting _____ a famous a...
【单选题】I often see my mother __________ chess with my father after supper.
A.
to play
B.
played
C.
play
D.
playing
【单选题】—Which of the caps will you take? —I’ll take _______,one for my father ,the other for my brother.
A.
neither
B.
both
C.
all
D.
either
【单选题】企业所拥有的资产从财产权利归属来看,一部分属于投资者,一部分属于
A.
企业职工
B.
债权人
C.
债务人
D.
企业法人
【单选题】My father often ________ Beijing for Shanghai.
A.
draws
B.
leaves
C.
cleans
D.
lives
【判断题】发动机VTEC的切换不受车速限制。 ( )
A.
正确
B.
错误
【单选题】My father often ( )football match on TV.
A.
looks
B.
sees
C.
watches
【单选题】My father often ____books late in the evening.
A.
read
B.
reading
C.
reads
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