When does the writing begin in CET-4? A: 10:50 am B: 9:10 am
When does the writing begin in CET-4? A: 10:50 am B: 9:10 am
AM-50型掘进机行走部使用的是（）电动机。 A: 15KW B: 30KW C: 40KW D: 5KW
AM-50型掘进机行走部使用的是（）电动机。 A: 15KW B: 30KW C: 40KW D: 5KW
A: How old are you? B: I ____________ 50 years old. A: am B: have C: turn D: do
A: How old are you? B: I ____________ 50 years old. A: am B: have C: turn D: do
为使AM-50型掘进机行走机构进行制动，在行走电动机内部设置（）制动装置。 A: 一组 B: 二组 C: 三组 D: 四组
为使AM-50型掘进机行走机构进行制动，在行走电动机内部设置（）制动装置。 A: 一组 B: 二组 C: 三组 D: 四组
【单选题】) — ____ you Miss Smith? — Yes, I ____ . A. Are; are B. Am; am C. Are; am D. Is; am A. Are are B. Am am C. Are am D. Is am
【单选题】) — ____ you Miss Smith? — Yes, I ____ . A. Are; are B. Am; am C. Are; am D. Is; am A. Are are B. Am am C. Are am D. Is am
I tired but I hungry.: am ; am not|am; am|are; are not|is; is not
I tired but I hungry.: am ; am not|am; am|are; are not|is; is not
当溶液中有两种辅助配位剂L 和A同时对金属离子M产生副反应，这时金属离子M的总副反应系数为 A: aM= aM(L )+ aM(A) B: aM= aM(L ) + aM(A)- 1； C: aM=aM(L )+aM(A)+ 1 D: aM=aM(L )-aM(A)
当溶液中有两种辅助配位剂L 和A同时对金属离子M产生副反应，这时金属离子M的总副反应系数为 A: aM= aM(L )+ aM(A) B: aM= aM(L ) + aM(A)- 1； C: aM=aM(L )+aM(A)+ 1 D: aM=aM(L )-aM(A)
It ____I who _____leaving for London. A: is…is B: am…is C: is…am D: am…am
It ____I who _____leaving for London. A: is…is B: am…is C: is…am D: am…am
—____ you Mingming? —Yes, I ____.: Am, am|Are,am|Are,are
—____ you Mingming? —Yes, I ____.: Am, am|Are,am|Are,are
I_____helpful.He_____helpful,too. A: is,am B: am,is C: am,are
I_____helpful.He_____helpful,too. A: is,am B: am,is C: am,are