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【单选题】
危险化学品库房门应为铁门或木质包铁皮,采取()。设置高侧窗(剧毒物品仓库的窗户应加设铁护栏)
A.
内开式
B.
外开式
C.
内、外开式都可以
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【单选题】He was so careless that he left _____the door ____. [     ]
A.
leaving…unlocked
B.
to leave…locked
C.
left…unlocking
D.
leaving…unlock
【简答题】以下程序的输出结果是 #include"stdio.h" #include main( ) { printf("%d\n",strlen("IBM\n012\1\\"));}
【单选题】He was so careless that he left _____the door ____.
A.
leaving…unlocked
B.
to leave…locked
C.
left…unlocking
D.
leaving…locking
【单选题】Jane was scolded by the director because he left the office with the door______.
A.
unlocking                            
B.
not being locked
C.
unlocked                              
D.
not locking
【单选题】He left in ______ a hurry that he forgot ______ the door.
A.
so; locking
B.
so ; to lock
C.
such; locking
D.
such; to lock
【单选题】以下程序的输出结果是: #include "stdio.h" main() { printf("%d\n",NULL); }
A.
因变量无定义输出不定值
B.
0
C.
-1
D.
1
【单选题】若要求DM系统的输出信噪比(量化信噪比)为30dB,且【图片】,【图片】,则DM系统所需的带宽为()kHz。
A.
20.35
B.
12.64
C.
40.69
D.
6.32
【单选题】下面关于PN结的描述中正确的是()。
A.
P接高电位、N接低电位时称为正向偏置
B.
PN结正偏时空间电荷区变厚
C.
PN结反偏时截止,没有任何电流
D.
P型半导体的少数载流子是空穴
【单选题】以下程序的输出结果是( ) #include "iostream.h" #include "string.h" void main() { char *p[10]={"abc","aabdfg","dcdbe","abbd","cd"}; cout< }
A.
2
B.
3
C.
4
D.
5
【单选题】以下程序的输出结果是( )。 #include "stdio.h" void main() { printf("%e",123.456);}
A.
123.456
B.
123.4560
C.
1.23456e2
D.
1.234560e+002
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