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【单选题】
以下有关血管内导管相关感染的描述错误的是
A.
导管出口部位感染是指导管出口部位2cm内的红斑、硬结和(或)触痛;或导管出口部位的渗出物培养出微生物,可伴有其他感染征象和症状,伴或不伴有血行感染
B.
导管病原菌定植是指导管头部、部分或导管接头处定量或半定量培养,确认有微生物生长>15菌落形成单位(cfu)
C.
隧道感染是指导管出口部位,沿导管隧道的触痛、红斑和(或)大于2cm的硬结,伴或不伴有血行感染
D.
囊感染是指完全植入血管内装置囊内有感染性积液;常有表面皮肤组织触痛、红斑和(或)硬结;自发的破裂或引流,或表面皮肤的坏死。可伴或不伴有血行感染
E.
导管相关血行感染是指留置血管内装置的患者出现菌血症,经外周静脉抽取血液培养至少一次结果阳性,同时伴有感染的临床表现
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【简答题】设函数f(x)= · ,其中向量 =(2cosx,1), =(cosx, sin2x),x∈R。 (1) 若函数f(x)=1- ,且x∈ ,求x; (2)求函数y=f(x)的单调增区间;并在给出的坐标系中画出y=f(x)在区间 [0,π]上的图像.
【单选题】What does John think about the new company magazine?
A.
It looks boring.
B.
It costs too much to produce.
C.
It's a useful resource.
【单选题】若函数y=sin 4 x+cos 4 x(x∈R),则函数的最小正周期为(  )
A.
π 4
B.
π 2
C.
π
D.
【单选题】脑水肿伴心功能不全者选用
A.
20%甘露醇
B.
呋塞米
C.
氨苯蝶啶
D.
氯噻酮
E.
50%葡萄糖
【简答题】The ______________ future of the company looks very promising.
【单选题】Jasmine looks _____visitors to the company.
A.
with
B.
to
C.
after
【简答题】(本题满分12分)设函数 ,其中向量 =(2cosx,1), =(cosx, sin2x),x∈R. (1)若f(x)=1- 且x∈[- , ],求x; (2)若函数y=2sin2x的图象按向量 =(m,n)(|m|$amp; )平移后得到函数y=f(x)的图象,求实数m、n的值.
【单选题】Is the new system better than the old system? 查看材料
A.
Yes, it's much better.
B.
It is a lot more effective.
C.
It doesn't seem that way.
D.
No. It' s worse.
【简答题】The company looks after its staff.
【单选题】What seems to be the effect of introducing the new system?
A.
The system has given equal opportunities to students.
B.
The system has reduced the number of cram schools.
C.
The system has intensified competition among schools.
D.
The system has increased students' study load.
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