双杆作业布置，对舷外吊杆稳索的系结点应尽量向后，并使吊杆与稳索的水平夹角（）。
A.大于20度
B.小于20度
C.大于30度
D.大于40度
参考答案：A
女性，35岁。右上腹痛2天，伴恶心、呕吐，今起疼痛阵发性加剧，伴畏寒，发热。体检：T38℃，巩膜无黄染，右上腹有压痛，诊断首先考虑
A．急性阑尾炎B．急性胆囊炎C．急性胰腺炎D．胃十二指肠溃疡穿孔
For a school to prove that it has made progress and emerge winner in the yearly battle, the principal, teachers and pupils will all have to focus their time and energy on achieving excellent academic results.
