螺栓紧好后,螺杆丝扣露出的长度:单螺母不应()2扣,双螺母可平扣;必须加垫圈者,每端垫圈不应超过()个。
A.小于
B.大于
C.1
D.2
参考答案:A, D
按要求改写句子。
1. It's rainy today. (就划线部分提问)
_________________________________________________________
2. How's the weather today? (同义句)
3. That is hot. That is cold. (改为选择疑问句)
4. My favourite shape is a square. (就划线部分提问)
5. It's twenty degrees outside. (就划线部分提问)
腹膜外位器官有()
A.肝
B.胆囊
C.子宫
D.输尿管
E.直肠上段