解决好______问题，事关全面建设小康社会大局，必须始终作为全党工作的重中之重。
参考答案：农业、农村、农民
It is playing computer games he spends so much time that he fails all the exams
A．which
B．what
C．in which
D．that
质粒PSC101带有何种抗性基因（）
A.卡那霉素抗性基因
B.四环素抗性基因
C.青霉素抗性基因
D.链霉素抗性基因
