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【单选题】
At the railway station，he waved goodbye to his friend until the train was ________.A.
out of sight
B.
out of reach
C.
out of order
D.
out of place
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反馈参考答案：
举一反三
【单选题】The parotid glands are located:
A.
inferior and anterior to the ears.
B.
at the base of the tongue.
C.
inferior to the liver.
D.
in the gastric mucosa.
E.
in the folds of the peritoneum.
【简答题】碳素工具钢随含碳量的增加其性能如何变化?
【单选题】which organ the picture shows:
A.
kidney
B.
liver
C.
pancreas
D.
parotid glands
E.
sublingual dland
【简答题】T12A是平均含碳量为（ ）的高级优质碳素工具钢。
【多选题】What are the following salivary glands?
A.
parotid gland
B.
submandibular gland
C.
sublingual gland
D.
tonsil
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