My girlfriend ______ a pen pal since she was in her early teens.AhadBhas hadChaveDhave had
My girlfriend ______ a pen pal since she was in her early teens.
Ahad
Bhas had
Chave
Dhave had
相关考题:
确定某种金属离子被滴定的最小pH值(配位滴定中,允许相对误差为±0.1%),一般根据以下哪项计算() A、lgcMKMY≥5,lgαY(H)=lgKMY–lgK’MYB、lgcMK’MY≥6,lgαY(H)=lgKMY–lgK’MYC、lgcMKMY≥8,lgαY(H)=lgK’MY–lgKMYD、lgcMK’MY≥6,lgαY(H)=lgK’MY–lgKMY;
10.1 have a good friend.______ name is Jane._____ is thirteen.A. Her ; HerB. She's; SheC. Her;SheD. She;She
She′s such an irritating woman,and I don′t know how you can__________her.A.put upB.put up withC.stand up withD.stand with
下面说法正确的是A.pH值越低,则αY(H)值越高,MY配合物越稳定B.pH值越低,则αY(H)值越高,MY配合物越不稳定C.pH值越高,则αY(H)值越低,MY配合物越不稳定D.pH值越低,则αY(H)值越低,MY配合物越稳定
【单选题】下面程序的输出是。 main() {enum team {my,your=4,his,her=his+10}; printf("%d%d%d%dn",my,your,his,her);}A.0 1 2 3B.0 4 0 10C.0 4 5 15D.l 4 5 15
用EDTA滴定金属离子M,为满足滴定要求,(误差≤0.2%)则lgαY(H)应满足的关系式是:A.lgαY(H)≥lgK(MY) +8B.lgαY(H)≤K(MY’)-9C.lgαY(H)≥lgK (MY)-8D.lgαY(H)≤ lgK(MY) -8
用EDTA标准滴定溶液滴定金属离子M,若要求相对误差小于0.1%,则要求:()A.CM KˊMY≥106B.CM KˊMY≤106C.KˊMY≥106D.KˊMYαY(H)≥106