白血病占癌症总发病数的()
A.1%
B.3%
C.5%
D.10%
E.15%
参考答案:C
解析:白血病是一种病因未明的造血系统恶性疾病,占癌症总发病数的5%。
S5600以太网交换机不支持的路由协议是()。
A.RIP
B.OSPF
C.ISIS
D.BGP
句型转换。
1.Shanghai is seven hundred years old.(对画线部分提问)
____ is Shanghai?
2.London is famous for Big Ben.(对画线部分提问)
is London famous____?
3.How many people are there in Ji'nan?(改为同义句)
____ Ji'nan?
4. This city is 500 years old. That city is 400 years old.(合并成一句)
This city is____ that city.
5.Betty is from New York.(对画线部分提问)
____ Betty ?