All applications must be ______ the manager by Friday.
A. submitting to
B. submited to
C. submit to
D. submitted to
查看答案
These letters should ______ us ______ all the information we need.
A. provide … with
B. supply … of
C. supply … for
D. provide … for
He insisted that Jack ______ to hospital immediately.
A. send
B. should send
C. sent
D. be sent
已知H-F、H-Cl、H-Br及H-I键的键能分别为569、431、366及299KJ/mol，试比较HF、HCl、HBr及HI气体分子的热稳定性。
NADH氧化呼吸链各组成成分排列顺序正确的是（）。
A. NAD+→复合体Ⅰ→泛醌→复合体Ⅲ→细胞色素c→复合体Ⅳ
B. NAD+→复合体Ⅱ→泛醌→复合体Ⅲ→细胞色素c→复合体Ⅳ
C. 复合体Ⅰ→泛醌→复合体Ⅲ→细胞色素c→复合体Ⅳ
D. 复合体Ⅱ→泛醌→复合体Ⅲ→细胞色素c→复合体Ⅳ
E. 复合体Ⅰ→复合体Ⅱ→复合体Ⅲ→复合体Ⅳ→NAD+→泛醌→细胞色素c
微信支付 
支付宝支付