装载机使用过程中,避免驱动桥非正常损坏的措施是()。
A.定期更换润滑油
B.润滑油面正常,保持箱内通风
C.避免换档冲击
D.上述都是
参考答案:C
—_______ good time we had at the party last night!
—Yes. It was _______ exciting party that I would never forget it. [ ]
A. What; so
B. How; such
C. What a: such an
D. How a; so an
生长偶联型的次生代谢物是在稳定期积累。