When he first started in university, he really felt at ______ with his major—economics.
A. shore
B. bank
C. ocean
D. sea
查看答案
When McGee announced his departure, his manner can best be described as being ______
A. arrogant.
B. frank.
C. self-centered.
D. impulsiv
排污单位发生事故致使排放物超过正常排放量,应向( )报告。
A. 当地环保部门
B. 当地安监局
C. 行政上级部门
D. 系统上级部门
一群三周龄鸭发病,主要症状为精神倦怠、缩颈、食欲降低、口鼻有分泌物,腹泻、排淡绿色粪便,临死前出血神经症状、头颈震颤、角弓反张,抽搐而死。剖检见心包膜、肝脏以及气囊有纤维素性渗出物。该病最可靠的确诊方法是( )
A. 细菌分离
B. 病毒分离
C. 易感动物接种
D. 病理组织学检查
E. 抗体检测
When did NASA start working on a successor to the shuttle
A. One year before the Columbia disaster.
B. One year after the Columbia disaster.
C. Immediately after the Columbia disaster.
D. Years before the Columbia disaster.