企业的经济效益（）。
A、与职业道德相矛盾
B、与职业道德水准有关
C、是靠制造销售假冒伪劣产品提高的
D、是靠不断扩大企业的规模提高的
参考答案：B
移植心脏对血钾和血中儿茶酚胺的反应正确的是（）
A.对钾不敏感
B.对儿茶酚胺敏感
C.B和D
D.对钾敏感
E.对儿茶酚胺不敏感
For many years, people （） electric cars. However, making them has been more difficult that predicted.
A. had dreamed of
B. have dreamed of
C. dreamed of
D. dream of
