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【判断题】
In two-step RT-qPCR assays, the reverse transcription and PCR steps are performed in separate tubes, with different optimized buffers, reaction conditions, and priming strategies.（）
A.
正确
B.
错误
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】A basic PCR set-up requires several components and reagents, Which of the following are included?（）
A.
DNA template
B.
DNA polymerase
C.
Two DNA primers
D.
dNTPs
【单选题】已知三阶实对称方阵$A$有特征值2,2,3,且$(1,1,1)^{T}$是属于3的特征向量。则$A$的属于2的线性无关的特征向量是（ )。
A.
$(1,-1,0)^{T},(1,0,-1)^{T}$
B.
$(-1,-1,2)^{T},(1,1,-1)^{T}$
C.
$(1,1,0)^{T},(1,0,-1)^{T}$
D.
$(1,-1,0)^{T},(2,1,-1)^{T}$
【多选题】About step of gene clone, Which of the following are included?（）
A.
Preparation of RNA to be cloned
B.
Creation of recombinant DNA with DNA ligase
C.
Introduction of recombinant DNA into host organism
D.
Screening for clones with desired DNA inserts and biological properties
【单选题】患者女性,19岁,左下腹疼痛1个月。CT:左下腹111mm×120mm椭圆形囊性团块,边缘光滑,包膜完整,密度均匀,CT值26Hu,无强化,病变推移子宫、肠管。最先考虑()
A.
卵巢囊肿
B.
卵巢囊腺瘤
C.
卵巢畸胎瘤
D.
卵巢皮样囊肿
E.
卵巢脓肿
【单选题】患者女性,40岁,一年前查体发现左下腹部直径约5cm实性肿物,未复查。一天前排尿时突然下腹痛,伴恶心,无发热。查体见子宫正常大,子宫左上方触及直径约14cm肿块,张力较大,不活动,有压痛。()
A.
卵巢肿瘤恶变
B.
卵巢肿瘤破裂
C.
卵巢肿瘤蒂扭转
D.
继发感染
E.
阑尾炎穿孔包裹
【多选题】下列哪项是卵巢恶性肿瘤的影像学诊断依据()
A.
肿瘤壁不规则,壁结节融合成块
B.
肿瘤内分隔厚且不规则
C.
肿瘤周围可有化学位移伪影
D.
合并有腹水
E.
有转移病灶