He missed the target because the wind hadn't been allowed ______.
A. to
B. for
C. of
D. in
毒性药品生产记录有效期()
A. 1年
B. 2年
C. 3年
D. 4年
E. 5年
______ for the timely investment from the general public, our company would not be so thriving as it is.
A. Had it not been
B. Were it not
C. Be it not
D. Should it not be
下列何项是泡腾片的组成
A. 醋酸与醋酸钠
B. 氢氧化钠与碳酸钠
C. 碳酸钠与洒石酸钠
D. 枸橼酸与碳酸氢钠
E. 枸橼酸与醋酸钠