皮皮学，免费搜题
登录
搜题
【单选题】
能发生羟醛缩合的醛必须是( )。A.
芳香醛
B.
含α-H的醛
C.
不含α-H的醛
D.
脂肪醛
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The crankshaft and connecting rod converts energy into energy used to drive the vehicle.
A.
mechanical, thermal
B.
mechanical, kinetic
C.
thermal, mechanical
D.
kinetic, mechanical
【单选题】The power mechanism is to covert _____energy into mechanical energy used to drive the vehicle.
A.
power
B.
mechanical
C.
thermal
D.
magnetic
【单选题】The _ __ is the source of power that provides the torque or turning force which is used to drive the vehicle.
A.
engine
B.
cylinder
C.
bore
D.
crankshaft
【判断题】Whoever has drunka little alcohol or taken psychotropic drugs controlledby the State, may be allowed to drive a motor vehicle.
A.
正确
B.
错误
【单选题】The crankshaft and connecting rod convert_____ energy into _____ energy used to drive the vehicle.
A.
thermal, mechanical
B.
mechanical, thermal
C.
kinetic, mechanical
D.
mechanical, kinetic
【单选题】The crankshaft and connecting rod converts energy into energy used to drive the vehicle.
A.
thermal, mechanical
B.
mechanical, thermal
C.
kinetic, mechanical
D.
mechanical, kinetic
相关题目：