()是保护人身安全的最后一道防线。
A.个体防护
B.隔离
C.避难
D.救援
参考答案:A
Most of the people in Guangdong are getting ________.
A.more and more rich
B.more rich and more rich
C.richer and richer
D.richer and richest
把下面各数改写成以“万”或以“亿”为单位的数.
675000改写:______;
50468000吨改写:______;
350790000000改写:______;
3670000000千克改写:______.