取药材数粒，加水共研，发生苯甲醛特殊香气的药材是
A．苦杏仁
B．五味子
C．马钱子
D．砂仁
E．决明子
参考答案：A
下列固态物质中，由离子构成的是（ ）
A．氯化钠
B．干冰
C．金刚石
D．红磷
______is the use of computing resources(hardware and software)which are available in a remote location and deliverd as a service over a network(typically the Internet)．
A．Virtualzation B．Internet of things C．Cloud computer D．Cloud computing
