在对心理测验进行区分时,应主要看编制者的目的和测验的实际内容。
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下列检查中,对鉴别单纯性肠梗阻与绞窄性肠梗阻最有帮助的是()。
A. 血白细胞明显升高,分类中性粒细胞超过90%
B. 腹平片可见多个液气平面
C. 腹腔穿刺抽出血性物
D. 血气分析示血氧分压降低
E. 血生化检查示电解质紊乱
1岁小儿,抽搐为间歇性双侧强直性肌痉挛,呈助产士手,最可能为()
A. 小儿癫痫
B. 婴儿痉挛
C. 低钙血症
D. 高热惊厥
E. 重症感染
What is the purpose of IGMP in a multicast implementation?()
A. it is not used in multicast
B. it determines the virtual address group for a multicast destination
C. it dynamically registers individual hosts in a multicast group on a specific LAN
D. it is used on WAN connections to determine the maximum bandwidth of a connection
E. it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow