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【单选题】
CaCl 2 溶解在1mol H 2 O中，使Cl — 与H 2 O分子的物质的量之比为1：10时，CaCl 2 为( )A.
0．1mol
B.
10mol
C.
0．5mol
D.
0．05mol
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反馈参考答案：
举一反三
【单选题】The government decides to impose a price ceiling on a good, because it thinks the market-determined price is “too high.” If the government imposes the price ceiling below the equilibrium price:
A.
. consumers will respond to the lower price and therefore wish to purchase more of the good than at the equilibrium price.
B.
. producers will respond to the lower price and therefore offer more units for sale.
C.
. consumers will be able to purchase more of the good after the price ceiling is imposed.
D.
. it will not be binding.
【简答题】简述檩条的荷载和荷载组合,并说明如何对檩条进行截面选择?
【单选题】It has been predicted that nanomaterials will become the most materials in the 21st century.
A.
potential
B.
expensive
C.
cheap
D.
controversial
【简答题】测定配合力的方法有哪些？
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