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【单选题】
关于数据常量的说法错误的是()A.
Java语言的整型常量有三种形式:八进制整数、十进制整数和十六进制整数
B.
Java语言的字符常量是用单引号括起来的单个字符。如'A'。
C.
Java语言的浮点型常量主要有两种形式:①科学计数法形式(如1.23E2)。②必须带小数点和数字的十进制数形式(如0.23)。
D.
Java语言的字符串常量是用双引号括起来的一串字符。如"name"。
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【简答题】井下空气中常见的有毒有害气体有哪些？
【简答题】He invited all ______ who had ever given him help in the past． A．these B．they C．them D．those
【单选题】all his courage, he invited Celine to get off the train with him．
A.
To gather
B.
Gathered
C.
Gathering
D.
Being gathered
【简答题】常见的窒息性气体有哪些？
【简答题】井下常见的有毒有害气体有哪些?
【简答题】矿井中常见的有害气体有哪些？
【单选题】Henry set up a club for football fans, ________ he invited all his friends．
A.
for whom
B.
to whom
C.
to which
D.
from which
【简答题】常见的刺激性气体有哪些?
【单选题】all his courage, he invited the lady to get off the train with him.
A.
Being gathered
B.
Gathered
C.
To gather
D.
Gathering
【简答题】He invited all his ______ to join in his wedding party. A) comrades-ins-arms B) comrades-in-arm C) comrade-in-arms D) comrades-in-arms
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