能引起白瞳症的疾病中，哪种最为常见（）。 A.视网膜母细胞瘤 B.先天性白内障 C.

根据所操作的生物因子的危害程度和采取的防护措施，将生物安全的防护水平分为四级，哪一级的防护水平最低

A．Ⅰ级

B．Ⅱ级

C．Ⅲ级

D．Ⅳ级

E．Ⅴ级

细胞化学染色TRAP阳性是下列哪种病的特征（）

A.急性淋巴细胞白血病

B.多发性骨髓瘤

C.多毛细胞白血病

D.幼淋巴细胞白血病

E.成人T细胞白血病

Virtualization is an approach to IT that pools and shares (71) so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human (72) are aligned around an application or business function. With a virtualized (73) , people, processes, and technology are focused on meeting service levels, (74) is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization (75) that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

（72）（）

A.profits

B.costs

C.resources

D.powers

男性患儿，瘦高个，发音似女性，阴茎和睾丸小，智能稍差。怀疑为先天性睾丸发育不全综合征，应进一步做下列哪项检查以获得确诊( )

A．颊黏膜染色质检查
B．血雌激素测定
C．末梢血染色体检查
D．血睾酮测定
E．睾丸活检

钻机“四检查”包括哪些？