（）发酵菌浓愈大，产物的产量也愈大。
A、氨基酸
B、维生素
C、A+B
D、抗生素
参考答案：C
–Jane, you’ve made such great efforts that you are ________ to pass the exam.
– It is very kind of you to say so, Mr. Smith.
A．easy
B．bound
C．possible
D．unlikely
自然条件
