某肺心病病人，PaC02：70 mmH9；BE：+10 mEq／L；pH：7.4，酸碱平衡紊乱类型为( )(难)

The most serious hypokalemia would occur in which of the following conditions? A: Decrease in potassium intake from 150 to 75 mEq/ day B: Increase in sodium intake from 100 to 200 mEq/ day C: Fourfold increase in aldosterone secretion plus high sodium intake D: Fourfold increase in aldosterone secretion plus low sodium intake

M: Glad to see you, Mrs. White. What can I do for you todayW: Would you please exchange RMB ￥ 1000 for US Dollars for meQ: What is the man’s job（） A: A bank clerk. B: A clerk in a post office. C: A school teacher. D: A shop assistant.

【单选题】要指定一个绝对位置 5 , 5 的点,应该输入: () @5 , 5 5 》 5 5 , 5 5<5< span=""> A. @5，5 B. 5》5 C. 5，5 D. 5<5

根据乘方的意义可知：53=5×5×5，54=5×5×5×5，则53×54=（5×5×5）×（5×5×5×5）=57即53×54=57。想一想：

【单选题】下面程序执行结果() #include main() { int i ,j ; for(i=1; i<=5; i++) { for(j=1; j<=i; j++) printf("%2d",i); printf(" ",); } } A. 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5 B. 1 2 3 4 5 C. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D. 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

5^2 5^3=5^5

【单选题】5 A. 5 B. 5 C. 5 D. 5

5<>5与5!=5结果相同

能正确表示数学关系：“[img=90x21]18031a61b498c1c.png[/img]”的C语言表达式是（ ）。 A: a>=-5 and a<=5 B: a>=-5 or a<=5 C: a>=-5 && a<=5 D: a>=-5 || a<=5