如果I/O所花费的时间比CPU处理时间短得多,则缓冲区 ______。 Ⅰ.最有效 Ⅱ.几乎无效 Ⅲ.均衡
A.只有Ⅰ
B.只有Ⅲ
C.只有Ⅲ
D.都不是
参考答案:D
按要求补全句子,每空一词。
1. 你能告诉我去邮局的路吗?(完成句子翻译)
Could you tell me the ____ ____ the post office?
2. Did Kangkang have a good time? (保持原意, 改写句子)
Did Kangkang _____ ____?
3. You can't play football on the street. (改成祈使句)
____ ____ football on the street!
4. I am drawing pictures now. (对划线部分提问)
____ are you ____ now?
5. There are some children in the room. (变为一般疑问句)
____ there ____ children in the room?
心力衰竭时X线可评价()
A.肺淤血程度
B.室壁厚度
C.心脏舒张功能
D.心脏收缩功能
E.心脏扩大程度