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【单选题】
生活饮用水水质卫生标准规定管网末梢水的游离余氯不低于A.
O.01mg/L
B.
O.02 mg/L
C.
0.03mg/L
D.
0.04mg/L
E.
O.05mg/L
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【简答题】He would have given you more help, if he ______ (not be) so busy.
【单选题】He is always thinking more of himself, seldom, _____, offering to help others. [ ]
A.
if never
B.
if ever
C.
if possi ble
D.
if any
【简答题】螺纹的要素包括 : 、 、 、 和 。只有当所有要素 才能旋合。
【单选题】Ben consumes soda and cheeseburgers. If his total utility from sodas is currently 40, and his total utility from cheeseburgers is 30, and the price of cheeseburgers is twice the price of sodas,
A.
Ben is in equilibrium.
B.
Ben should increase his soda consumption and decrease his cheeseburger consumption.
C.
Ben should decrease his soda consumption and increase his cheeseburger consumption.
D.
we cannot conclude that any of the above are correct.
【单选题】Ben consumes soda and cheeseburgers. If his marginal utility from sodas is currently 20, and his marginal utility from cheeseburgers is 10, and the price of cheeseburgers is twice the price of sodas,
A.
Ben is in equilibrium.
B.
Ben should increase his soda consumption and decrease his cheeseburger consumption.
C.
Ben should decrease his soda consumption and increase his cheeseburger consumption.
D.
we cannot conclude that any of the above are correct.
【单选题】Sue consumes only sandwiches and soda and is at her best affordable point. The price of a sandwich falls. The substitution effect is that Sue substitutes ________ for ________. The income effect is th...
A.
sandwiches; soda; buys less of both goods
B.
soda; sandwiches; buys more soda and fewer sandwiches
C.
sandwiches; soda; buys more of both goods
D.
soda; sandwiches; buys less soda and more sandwiches
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