【多选题】锶是人体中的微量元素,关于锶的说法正确的是()。
【单选题】怎样挖掘出好的企业构思,下面表述最完整的是_____。
【判断题】点浇口主要应用于成型添加纤维填料的塑料注射模。( )
【单选题】Which of the following is NOT mentioned in the passage as an area of dance that Isadora Duncan worked to change?
【单选题】锶元素(元素符号为Sr)原子结构示意图如下图所示,下列说法错误的是
【单选题】锶(Sr)是元素周期表中第五周期IIA族的元素,下列关于锶及其化合物的说法中不正确的是( )
C.
Sr(OH) 2 的碱性比Ca(OH) 2 弱
【单选题】听力原文:To the teacher's surprise, better than half of the class was absent, which accounted for his decision to cancel the lecture. (23)
A.
The better half of the class decided to cancel the lecture
B.
Teacher was surprised to find less than half of the class was present, but he decided to give his lecture as originally planned.
C.
The teacher's surprising announcement to cancel the lecture led to chaos.
D.
Unexpectedly, less than half0f class were present.