尿毒症时，早期常出现的临床症状是
A．贫血
B．出血
C．高血压
D．心力衰竭
E．胃肠道症状
参考答案：E
These diagrams are especially helpful when we have a concrete problem ______ at hand.
A．be solved
B．to solve
C．solved
D．being solved
特发性尿崩症(idiopathic diabetes insipidus)
