对均相反应:aA+bB=gG+hH,下列关系中正确的是:() A: -dcA/dt=-dcB/dt=dcG/dt=dcH/dt B: (1/a-dcA/dt)=(1/b-dcB/dt)=(1/gdcG/dt)=(1/hdcH/dt) C: a(-dcA/dt)=b(-dcB/dt)=g(dcG/dt)=h(dcH/dt) D: g(-dcA/dt)=(ag/b-dcB/dt)=a(dcG/dt)=(ag/hdcH/dt) E: (a/g-dcA/dt)=(b/g-dcB/dt)=dcG/dt=(g/hdcH/dt)

The rate law for the reaction of aA + bB → gG + hH can be expressed as dcA/（__）dt = dcB /（__）dt=dcG /（__）dt = dcH /（__）dt.

本田著名车型雅阁已生产多年，有多个型号，下面哪个型号不属于雅阁？（） A: ACD4 B: BCD5 C: CEK3 D: DCG5

The patient is a 46-year-old male. He was admitted to hospital after one-month paroxysmal chest pain. With each attack, sublingualnitroglycerincould relieve chest pain. We consider the disease as coronary heart disease and angina. The most commonly used method of examinationis A: Coronary CTA B: Radionuclide inspection C: DCG D: UCG

使用夹角法测试地网接地阻抗，接地阻抗的测试值为1欧姆，D为200m，dPG为1km，dCG为1km，dCP为1km，则接地阻抗修正值了（）欧姆。 A: 0.9 B: 1 C: 1.11 D: 1.25

【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