【多选题】下列说法错误的是( )。
D.
酸碱缓冲溶液时一种对溶液的酸度起稳定(缓冲)作用的溶液。
【简答题】Answer the following questions with the information contained in Text A. 1 What is the main idea of the essay? 2 What is the author ’ s attitude towards f ame? 3 What does an artist have to do to stay...
【简答题】1) Does man tend to become less dependent on nature with the rapid development of society? Why or why not? 2) What does the author think about the present relationship between man and nature? 3) What’...
【判断题】恒压交流铁心磁路,则空气气隙增大时磁通不变。
【单选题】What does the man say is most important in making a good pub?
C.
The owner ’ s attitude
【单选题】以下程序调用scanf函数给a输入数据的方法错误,错误原因是() main(){ int a,b,*p,*q; p = &a; printf("please input a:"); scanf("%d",*p); }
【简答题】缓冲溶液能够对溶液的酸碱度起一定的稳定作用,它多由弱酸及其 _ __ 组成。此外,浓度较高的 溶液 也有一定的缓冲作用;但其中随溶液被稀释其 pH 将显著变化的是 。
【单选题】若x,y均定义为int型,z定义为double型,以下不合法的scanf函数调用语句是( )。
A.
scanf("%d%1x,%1e",&x,&y,&z):
B.
scarlf("%2d,%d%f",&x,&y,&z);
C.
scanf("%x%*d%o",&x,&y);
D.
scanf("%x%o%6.2f",&x,&y,&z);
【判断题】在恒压交流铁心磁路中,增大空气气隙时磁通不变。( )