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【单选题】
苷提高心肌收缩力作用机制是A.
激活心肌细胞上的Na + -K + -ATP酶，提高细胞内钙离子浓度
B.
激活心肌β受体，提高细胞内cAMP浓度
C.
抑制心肌细胞膜上的Na + -K + -ATP酶，提高细胞内钙离子浓度
D.
提高交感神经活性
E.
阻止细胞外钙离子内流
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反馈参考答案：
举一反三
【多选题】许慎对于“六书”的描述，下列哪些条是正确的
A.
假借者，本无其字，依声托事，令长是也
B.
会意者,比类合谊,以见指伪，武信是也
C.
形声者,画成其物,随体诘诎,日月是也
D.
转注者,视而可识,察而见意,上下是也
【单选题】In a small closed economy investment is $50 billion and private saving is $55 billion. What are public saving and national saving?
A.
$60 billion and $5 billion
B.
$50 billion and -$5 billion
C.
$5 billion and $60 billion
D.
-$5 billion and $50 billion
【单选题】In a small closed economy investment is $50 billion and private saving is $55 billion. What is national saving?
A.
$5 billion
B.
-$5 billion
C.
$60 billion
D.
$50 billion
【单选题】The factor that makes national saving equal investment, in equilibrium, is:
A.
the interest rate.
B.
private saving.
C.
public saving.
D.
fiscal policy.
【单选题】许慎对“会意”的定义是
A.
比类合谊，以见指撝，武信是也。
B.
画成其物，随体诘诎，日月是也。
C.
视而可识，察而可见，上下是也。
D.
以事为名，取譬相成，江河是也。
E.
建类一首，同意相受，考老是也。
F.
本无其字，依声托事，令长是也。
【单选题】许慎对“会意”的定义是
A.
画成其物,随体诘诎,日月是也。
B.
视而可识,察而可见,上下是也。
C.
比类合谊,以见指撝,武信是也。
D.
以事为名,取譬相成,江河是也。
【单选题】Suppose that GDP is equal to 1000, national saving is equal to 200, the current account deficit is equal to 100, and the government budget deficit is equal to 50. Private savings must equal
A.
150.
B.
200.
C.
250.
D.
300.
【单选题】Suppose that GDP is equal to 1000, national saving is equal to 200, the current account deficit is equal to 100, and the government budget deficit is equal to 50. Investment must equal
A.
150.
B.
200.
C.
250.
D.
300.
【单选题】In developing economies, national saving is often ________ relative to developed economies
A.
high
B.
the same
C.
hard to tell
D.
low
E.
low for the very poor countries and high for the more developed
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