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【单选题】
钠与水反应时的现象与钠的下列性质无关的是 [ ]A.
钠的熔点低
B.
钠的密度小
C.
钠的硬度小
D.
钠很活泼
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The rate of labor-augmenting technological progress ( g ) is the growth rate of:
A.
labor
B.
the efficiency of labor.
C.
capital.
D.
output.
【多选题】长期使用糖皮质激素,在突然停药或减量过快时
A.
几乎所有患者均出现旧病复发或恶化
B.
某些患者遇严重应激情况,可发生肾上腺皮质危象
C.
若患者对激素产生依赖性或病情尚未完全控制,可能出现旧病复发或恶化
D.
可引起肾上腺皮质功能不全
【单选题】The growth rate of bacteria during the exponential phase of growth is
A.
Zero
B.
Increasing
C.
Constant
D.
Decreasing
E.
Negative
【多选题】假设某企业甲产品生产为大量大批多步骤生产，原材料分阶段投入，并在每道工序陆续投入。该产品经过两道工序加工，每道工序投入材料的定额费用为:第一道工序30元，第二道工序20元。两道工序单位在产品工时定额分别为:第一道工序6小时，第二则每道工序4小时。则每道工序在产品的投料程度为( )。
A.
30%
B.
60%
C.
80%
D.
100%
【单选题】All of the following would increase the growth rate of the economy EXCEPT
A.
raising the saving rate.
B.
stimulating research and development.
C.
discouraging international trade.
D.
None of the above answers is correct because they all would increase the growth rate.
【简答题】长期使用糖皮质激素,停药过快可引起__________和__________不良反应。
【单选题】In the Solow growth model, the steady-state growth rate of output per effective worker is ______, and the steady-state growth rate of output per actual worker is ______.
A.
the sum of the rate of technological progress plus the rate of population growth; zero
B.
zero; the rate of technological progress
C.
zero; zero
D.
the rate of technological progress; the rate of population growth
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