具有法律强制执行效力的是:()
A.希望和解意向书
B.联合调解成功制作的调解书
C.仲裁机构调解成功后制作的调解书
D.法庭调解成功后制作的调解书
参考答案:B, C, D
Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life.
A.if
B.what
C.that
D.When
CCC控制器最低控制速度为多少?为何要设置最低控制速度?