所有酸性焊条采用交流电源焊接,焊厚板时y用直流正接,焊薄板时用直流反接。
错误
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OppositionleaderswillbewatchingcarefullytoseehowthePrimeMinister________thecrisis.
Alinguistictheoryisconstructedaboutwhat______isandhowitworks.
翻译:WewishtocallyourattentiontothevalidityoftheL/C,sincethereisnopossibilityofL/Cextension.
Hegraduatedfromcollege________hisparentsdivorced.
Theirplanearrived________SanFranciscothismorning.