改革农业灌溉技术的主要措施是[ ]
A.实行漫灌
B.实行喷灌、滴灌
C.防治水渠漏水
D.缺水地区推广耐旱作物
答案:B
—Didn' you go to your sister' wedding?
—No, didn'; I’d like to have, ______.[ ]
A. though
B. either
C. too
D. instead
食管疾病可能引起的症状有()
A.吞咽阻挡感
B.吞咽疼痛
C.呼吸困难
D.吞咽困难
E.呕血