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【单选题】
He has three ______ under the bed. [ ]A.
pair of shoe
B.
pairs of shoe
C.
pairs of shoes
D.
shoes
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【单选题】关于强直性脊柱炎的描述错误的是（）
A.
属结缔组织的血清阳性反应疾病
B.
早期常累及双侧骶髂关节
C.
HLA-B27阳性率高
D.
可累及椎间关节，导致关节僵直
E.
可累及髋关节，导致关节僵直
【单选题】China is getting better at making hi-tech products _________ can be bought in all parts of the world.
A.
who
B.
which
C.
What
【单选题】关于强直性脊柱炎的描述，错误的是：（ ）
A.
以中轴关节慢性炎症为主的全身疾病
B.
好发于男性
C.
常导致脊柱韧带广泛骨化，致纤维性强直
D.
几乎均有骶髂关节受累
【简答题】Although developing hi-tech computerized toys is really a job, the market always responds well to these products.
【简答题】Fit Co specialises in the manufacture of a small range of hi-tech products for the fitness market. They are currently considering the development of a new type of fitness monitor, which would be the f...
【简答题】There are products on show at the Shenzhen Hi-tech Fair.
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