皮皮学，免费搜题
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【单选题】
下列哪个不是导致肌肉拉伤的原因之一？
A.
准备活动不充分
B.
体质较弱
C.
运动技术差
D.
气温过高
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【判断题】波长和频率的关系是，频率越高，波长越长，频率越低，波长越短。
A.
正确
B.
错误
查看完整题目与答案
【判断题】电磁波的波长×频率 = 光速。电波的波长越长频率越高,波长越短则频率越低。
A.
正确
B.
错误
查看完整题目与答案
【单选题】On December 26, 2004, a terrible tsunami happened in the Southeast Asia, _________ many people.
A.
killing
B.
had killed
C.
killed
D.
having killed
查看完整题目与答案
【单选题】关于长波、中波、短波的下列说法中正确的是 [     ]
A.
长波的波长较长、频率较高
B.
短波的波长较短、频率较低
C.
长波的波长较长、频率较低
D.
中波的波长较短、频率较高
查看完整题目与答案
【单选题】机器的日常保养维修项:( )
A.
每日保养
B.
每周保养
C.
每月保养
D.
每季保养
查看完整题目与答案
【判断题】电磁波的波长*频率=光速,电波的波长越长频率越高,波长越短则频率越低。A. √ B. ×
A.
正确
B.
错误
查看完整题目与答案
【判断题】电磁波的波长和频率成正比。波长越长，频率越高；波长越短，频率越低
A.
正确
B.
错误
查看完整题目与答案
【单选题】Many people were afraid to go to swim when they remembered the scenes________ people were eaten by the big white shark.
A.
in which
B.
by which
C.
which
D.
that
查看完整题目与答案
【单选题】How many people were at the meeting?
A.
Four people were at the meeting.
B.
Five people were at the meeting.
C.
Three people were at the meeting.
查看完整题目与答案
【单选题】图表中包含数据系列的区域叫_____。
A.
绘图区
B.
图表区
C.
标题区
D.
状态区
查看完整题目与答案
相关题目：
【判断题】波长和频率的关系是，频率越高，波长越长，频率越低，波长越短。
A.
正确
B.
错误
查看完整题目与答案
【判断题】电磁波的波长×频率 = 光速。电波的波长越长频率越高,波长越短则频率越低。
A.
正确
B.
错误
查看完整题目与答案
【单选题】On December 26, 2004, a terrible tsunami happened in the Southeast Asia, _________ many people.
A.
killing
B.
had killed
C.
killed
D.
having killed
查看完整题目与答案
【单选题】关于长波、中波、短波的下列说法中正确的是 [     ]
A.
长波的波长较长、频率较高
B.
短波的波长较短、频率较低
C.
长波的波长较长、频率较低
D.
中波的波长较短、频率较高
查看完整题目与答案
【单选题】机器的日常保养维修项:( )
A.
每日保养
B.
每周保养
C.
每月保养
D.
每季保养
查看完整题目与答案
【判断题】电磁波的波长*频率=光速,电波的波长越长频率越高,波长越短则频率越低。A. √ B. ×
A.
正确
B.
错误
查看完整题目与答案
【判断题】电磁波的波长和频率成正比。波长越长，频率越高；波长越短，频率越低
A.
正确
B.
错误
查看完整题目与答案
【单选题】Many people were afraid to go to swim when they remembered the scenes________ people were eaten by the big white shark.
A.
in which
B.
by which
C.
which
D.
that
查看完整题目与答案
【单选题】How many people were at the meeting?
A.
Four people were at the meeting.
B.
Five people were at the meeting.
C.
Three people were at the meeting.
查看完整题目与答案
【单选题】图表中包含数据系列的区域叫_____。
A.
绘图区
B.
图表区
C.
标题区
D.
状态区
查看完整题目与答案