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【单选题】
在电极式锅炉水位控制系统中,电极1、2、3分别检测高水位、低水位和危险水位,为提高锅炉允许的高水位,调整方法是——。A.
电极l、2不动,降低电极3
B.
电极1、3不动,降低电极2
C.
电极1、3不动,升高电极2
D.
电极2、3不动,升高电极l
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举一反三
【单选题】Sam will make more progress if he _______ harder. [ ]
A.
will work
B.
was working
C.
works
D.
worked
【单选题】I’m not sure if he ______ in this exam. But if he ______ harder, he will do better.
A.
succeeds; works
B.
will succeed; will work
C.
will succeed; works
D.
succeeds; will work
【单选题】C语言中,语句x=!a==b;执行的次序是 。
A.
先执行=,再执行!,再执行==
B.
先执行==,再执行!,再执行=
C.
先执行!,再执行==,再执行=
D.
执行次序是随机的
【单选题】Jack has made great achievements in his work, and the harder he works, the _________ he becomes.
A.
religious
B.
energetic
C.
curious
D.
independent
【单选题】Generally speaking, the harder one works, ______.
A.
the better he gets result
B.
the better result he gets
C.
he gets better result
D.
does he get better result
【单选题】Generally speaking, the harder one works, ____________.
A.
the better he gets result
B.
The better results he gets
C.
He gets better results
D.
Does he get better results
【单选题】Jack has made great achievements in his work, and the harder he works, the more _________ he becomes.
A.
religious
B.
energetic
C.
curious
D.
independent
【单选题】If he ______ harder next time, he will catch up with (赶上) us. [ ]
A.
work
B.
worked
C.
works
【单选题】If he ______ harder from now on, he will catch up with us. [ ]
A.
work
B.
worked
C.
works
D.
will work
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