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【单选题】
“物质的量”是国际单位制中的一个基本物理量，有关说法正确的是A.
lmol H 2 的质量为1g
B.
1mol H 2 约含6.02×10 23 个氢原子
C.
lmol H 2 O含有3mol原子
D.
H 2 O的摩尔质量是18g
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举一反三
【简答题】In the view of environmental economics, economically sound projects do not in themselves constitute practical decision-.
【单选题】B2B电子商务交易的优势不包括
A.
无须中介参与，简化了交易的环节
B.
使无库存生产和无库存销售成为可能
C.
可省去传统方式下做广告发印刷品等的大量费用
D.
交易的手续变得繁琐，交易成本也增加了
【单选题】A(n) ______ is one who organizes a new business venture in the hopes of making a profit.
A.
manager
B.
leader
C.
entrepreneur
D.
boss
【判断题】There are a total of 2 n +1 mutually exclusive alternatives that can be formulated from n independent projects, if there are no restrictions on the projects or the investment amount.
A.
正确
B.
错误
【单选题】It seems that now a country/'s economy depends much on _______ .
A.
how welldeveloped it is electronically
B.
whether it is prejudiced against immigrants
C.
whether it adopts America's industrial pattern
D.
how much control it has over foreign corporations
【判断题】The magazine was marketed to people who did not enjoyed making things and not features complex projects .
A.
正确
B.
错误
【判断题】There are a total of 2 n -1 mutually exclusive alternatives that can be formulated from n independent projects, if there are no restrictions on the projects or the investment amount.
A.
正确
B.
错误
【单选题】Mrs、Black became a(n) _______ at making desserts.
A.
expert
B.
worker
C.
host
D.
specialist
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