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【单选题】
Jane studies chemistry ________ asking the teacher ________ help.A.
for; by
B.
for; to
C.
by; by
D.
by; for
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举一反三
【单选题】Material culture refers to the touchable, material 'things'—physical objects that can be seen, held, fell, used — that a culture produces. Examining a culture's tools and technology can tell us about ...
A.
it helps produce new cultural tools and technology
B.
it can reflect the development of the nation
C.
it helps understand the nation's past and present
D.
it can demonstrate the nations civilization
【单选题】关于拟肾上腺素药的叙述，错误的是
A.
肾上腺素可激动α、β受体
B.
麻黄碱可激动α、β受体
C.
去甲肾上腺素主要激动α受体，对β1受体也有一定的激动作用
D.
多巴胺可激动α、β受体
E.
异丙肾上腺素可激动α、β受体
【单选题】下列关于拟肾上腺素药的叙述错误的是
A.
肾上腺素可激动α、β受体
B.
去氧肾上腺素主要激动α1受体，对β受体几乎无作用
C.
去甲肾上腺素主要激动α受体，对β1受体作用较弱
D.
多巴胺可激动α、β1以及肾血管多巴胺受体
E.
异丙肾上腺素可激动α、β受体
【单选题】The phrase 'physical products' in the second paragraph means ______.
A.
things that can be seen or felt
B.
things useful for health care
C.
things that help you keep fit
D.
things connected with sports
【单选题】Physical exercises not only are useful for character training but also can ________ man’s body.
A.
make up
B.
keep up
C.
bring up
D.
build up
【单选题】What can be inferred from the professor's remarks?
A.
Physical illnesses come along with old age.
B.
Physical changes take place gradually.
C.
People suddenly become weak at 65.
D.
Illnesses occur mostly at the age of 65.
【简答题】激动α受体和β受体的药物有 、 ,主要作用于α受体的拟肾上腺素药有 、 ,主要激动β受体的药物有 、 。
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