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【简答题】
本—量—利分析的基本假设有哪些？说明它们的具体含义。
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举一反三
【单选题】Our team leader told us more than one answer to the exercise _____ possible.
A.
is
B.
be
C.
are
D.
were
【多选题】因特网公众禁止访问业务子网。但对于因特网上的内部移动办公用户，可以采用哪些技术访问业务子网，必须具有相应的数据加密和身份认证方式（）
A.
IPSec
B.
SSL
C.
VPDN
D.
VLAN
【单选题】除去下列物质中的少量杂质（括号内为杂质）所用除杂方法不正确的是 选项 待提纯的物质 除去杂质的方法
A.
CO 2 （CO） 将混合气体通过足量的灼热的CuO
B.
Cu（CuO） 加入足量的稀硫酸、过滤、洗涤、干燥
C.
NaCl溶液（Na 2 CO 3 ） 加入适量的稀硫酸
D.
ZnSO 4 溶液（FeSO 4 ） 加入足量的锌粉，过滤
【单选题】I would have paid a visit to you _______ possible.
A.
if it were
B.
would it be
C.
had it been
D.
should it have been
【单选题】英版《潮汐表》的“潮流预报表”中,往复流给出 。I、转流时间;II、最大流速;III、最大流速时间;IV、流向;V、预报位置;VI、是否包括海流
A.
I~V
B.
I~VI
C.
I~III
D.
I~III,V
【单选题】If it had been possible, I would have helped him, but I ______ too busy.
A.
had been
B.
would be
C.
were
D.
was
【简答题】在板式塔的吸收中,原料中的平衡常数小的组分主要在塔内( )板被吸收。
【单选题】Some people thought ________ possible to live on out space in the future .
A.
it
B.
it be
C.
it is
D.
that is
【单选题】If It had been possible, I would have helped him, but I ______ too busy the.
A.
had been
B.
would be
C.
were
D.
was
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