未知题型
A.Sometimes they are unreliable.B.Obviously they have made a mistake.C.On the whole they can be trusted.D.Generally speaking, they are very helpful.
C解析:选项中的they,unreliable,can be trusted,helpful等表明,本题与对t......
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未知题型 登山、划船、游泳、滑冰等运动属于( )。
单项选择题 由立克次体引起的疾病,大多数为人畜共患。( )
问答题 某工程现浇井字梁顶棚如图所示。麻刀石灰浆面层,计算工程量,确定定额项目。