Solittle_____witheachotherthattheneighbouringcountriescouldnotsettletheirdifferences.
A. theyagreed
B. agreedthey
C. didtheyagree
D. theydidagree
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_____,Ihaveneverseenanyonewho’sascapableasJohn.
AslongasIhavetraveled
B. NowthatIhavetraveledsomuch
C. MuchasIhavetraveled
D. AsIhavetraveledsomuch
_____,youcan'tlifttheheavyboxup.
A. Evenyou'restrong
B. Strongasyouare
C. Howstrongyouare
D. Asyou'restrong
中性线的作用是( )。
A. 保证负载侧的线电压对称
B. 保证负载侧的相电压对称
C. 保证负载侧的线电流对称
D. 保证负载侧的相电流对称
照明负载在电网中采用的连接方式是( )。
A. Y
B. Y0
C. △
D. 以上都不对