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单选题
副翼卡阻时，选择机长一侧ROLL SEL电门会提供：Selecting the ROLL SEL switch on the captain’s side during a aileron jam situation will provide:
A
对侧多功能扰流板。Off side multi-function spoilers
B
当侧多功能扰流板。 On side multi-function spoilers
C
恢复所有副翼控制。 Restoration of all aileron control
D
仅作为一个提示机长在控制副翼。Only a reminder that the captain is controlling the ailerons
答案解析
正确答案：B
