国家长治久安的重要保障是()。
A. 依法治国
B. 君主立宪
C. 多党轮流执政
D. 党的政策
对计量标准考核的目的是()。
A. 确定其准确度;
B. 确认其是否具有开展量值传递的资格;
C. 评定其计量性能;
__________he presented her at the dance party was an engagement ring
A. That
B. What
C. When
D. How
Let’s listen to the radio program that the teacher mentioned,_______?
A. do we
B. shall we
C. don’t we
D. will we