The students must finish the test in ____. A.three quarters of an hour timeB.three quarter’s of an hour timeC.three quarters of an hour’s timeD. 分类:机械设备维修 题型:选择题 查看答案
Sometimes I can’t help wondering what’s the matter with Tom. A.upsetsB.recognizesC.concernsD.Ignores 分类:机械设备维修 题型:选择题 查看答案
-What were you doing at nine last night? -__________. A.I was watching TV at that time.B.Yes, but I can’t afford the timeC.I did my homework.D.I am going t 分类:机械设备维修 题型:选择题 查看答案
在旁油路节流调速回路中,节流阀同流面积A增大时,执行元件的速度U将( )。 在旁油路节流调速回路中,节流阀同流面积A增大时,执行元件的速度U将( )。A.增大B.降低C.不变D.都可以 分类:机械设备维修 题型:选择题 查看答案