题目内容
（请给出正确答案）
[主观题]
To survive in the intense trade competition between countries, we must ______ the qualitie
s and varieties of products we make to the world market demand.
A．improve
B．enhance
C．guarantee
D．gear
如搜索结果不匹配，请 联系老师 获取答案
（6）
A. 中断
B. DMA
C. 程序查询
D. 无条件传送
