经纬仪在进行角度观测之前，不必要满足的条件是( )。
A．LL⊥VV
B．CC⊥HH
C．HH⊥VV
D．CC⊥L'L’
参考答案：D
_____ not to miss the flight at 15 :20, the manager set out for the airport in a hurry. [ ]
A. Reminding
B. Reminded
C. To remind
D. Having reminded
原发性醛固酮增多症的表现是
A．少尿伴肾绞痛B．少尿伴心悸气促、胸闷不能平卧C．少尿伴大量蛋白尿、水肿、高脂血症和低蛋白血症D．少尿伴排尿困难E．少尿伴乏力纳差、腹水、皮肤黄染
